Provide actual setup instructions

[NathanSweet]

This project makes too many assumptions that the user knows what they are doing. For example:

Deploy the placeholder smart home provider to Cloud Functions for Firebase using the same Project ID:

I have no idea what that means, I assume it's what the commands do. Except what folder am I supposed to run the listed commands? From the root of the project doesn't work:

npm install --prefix functions/
npm ERR! code ENOLOCAL
npm ERR! Could not install from "" as it does not contain a package.json file.

So I need to run the command where there is a package.json? The app, device, and functions folders have a package.json. Which do I use? OK the command succeeds in the app subfolder but the next command does not:

npm run firebase --prefix functions/ -- use ${PROJECT_ID}
npm ERR! code ENOENT
npm ERR! syscall open
npm ERR! path [snip]\app\functions\package.json
npm ERR! errno -4058
npm ERR! enoent ENOENT: no such file or directory, open '[snip]\app\functions\package.json'

I have no idea. Please provide instructions that can be followed to get the desired result.

[devedse]

I also ran into this error. I fixed this by running the commands from the functions/ directory themselves.
e.g.

cd functions
npm install

[bugs181]

Yup. Recently switched from a new iPhone 12 Pro to Google Pixel 6 Pro and migrating all of my home automation over. I am completely new to Google services and APIs. I've been trying to get this example running for over 5 hours.